简单的定时任务可以直接通过Spring自带的task来实现,复杂的定时任务则可以通过集成Quartz来实现。
Timer:这是java自带的java.util.Timer类,这个类允许你调度一个
java.util.TimerTask任务。使用这种方式可以让你的程序按照某一个频度执行,但不能在指
定时间运行。一般用的较少。
Quartz:这是一个功能比较强大的的调度器,可以让你的程序在指定时间执行,也
可以按照某一个频度执行,配置起来稍显复杂。
Task是由Spring自带的定时器,使用方便、简单
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.time</groupId> <artifactId>TimeTask</artifactId> <version>0.0.1-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.0.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <properties> <!-- 声明项目配置依赖编码格式为 utf-8 --> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <fastjson.version>1.2.24</fastjson.version> </properties> <dependencies> <!--定时器依赖 --> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>2.2.1</version><!--$NO-MVN-MAN-VER$--> </dependency> <!-- 该依赖必加,里面有sping对schedule的支持 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> </dependency> <!--必须添加,要不然会出错,项目无法启动 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> </dependency> <!--devtools热部署 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> <scope>true</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> </project>
package com.tszr.time.job; import java.util.Date; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.context.annotation.Configuration; import org.springframework.scheduling.annotation.EnableScheduling; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Component; @Configuration @Component @EnableScheduling public class ScheduledTask { private Logger log = LoggerFactory.getLogger(ScheduledTask.class); @Scheduled(cron = "0 0/1 * * * ?") public void testOne() { log.info("每分钟执行一次"); } @Scheduled(fixedRate = 30000) public void testTwo() { log.info("每30秒执行一次"); } @Scheduled(cron = "0 0 1 * * ?") // 表示每天凌晨一点执行 public void initTask() { // 执行任务 log.info("执行任务" + new Date()); } }
package com.tszr.time; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.scheduling.annotation.EnableScheduling; @SpringBootApplication @EnableScheduling public class TimeSpringApplication { public static void main(String[] args) { SpringApplication.run(TimeSpringApplication.class,args); } }